HardLabs

Caelus

CaelusRocketry·launch-box·PCBs/TestStand/TSV3/12-21 @ 00_00 - PCBVIII/CaelusPCB.kicad_pcb

Caelus PCB layout, top view — open source NXP board by CaelusRocketry

About the Caelus PCB

Caelus is an open source NXP PCB design by CaelusRocketry, published on GitHub. It is a 2-layer board measuring 247.7 × 178.4 mm, with 89 components from 17 distinct parts.

Its main chip is the Teensy3.6, from the NXP family. Other key parts include the MAX31856, 6-Channel-5V-Relays, L7805, Launchbox_HT12D and SPDT_IC. By type, the board carries 29 connectors, 29 resistors, 27 ICs, 2 diodes and 1 battery holder.

From the project

Source code for our rocket's launch box.

1.) -.lib: Looks like CaelusPCB.lib or Launchbox.lib These are our stable global project libraries, meaning that they are like the framework for all components in all projects

2.) -cache.lib When you copy a project directory, its -cache.lib file is copied with it. If you make changes to the schematic, for example adding a new component, the local -cache.lib file will update. The -cache.lib of the copied project remains the same, and this is how we do version control. You don't need to really know how this process works or why its important. You just need to know that you add components to…

Main components on the Caelus

MAX318566-Channel-5V-RelaysL7805Launchbox_HT12DSPDT_ICTeensy3.6LoadCellAmpXBee_Breakout

Caelus bill of materials (BOM)

89 components, 17 distinct parts.

QtyPartRefs
4
MAX31856
U1, U15, U18, U33
2
6-Channel-5V-Relays
U2, U4
1
L7805
U3
3
Launchbox_HT12D
U19, U34, U50
12
SPDT_IC
U20, U21, U22, U44, U48, U49, U51, U52 +4
1
Teensy3.6
U23
3
LoadCellAmp
U25, U36, U46
1
XBee_Breakout
U56
3
440055-5
J1, J2, J3
12
XT60-M
J4, J5, J6, J7, J8, J9, J10, J11 +4
12
440055-3
J16, J17, J18, J19, J20, J21, J22, J23 +4
2
CaelusPCB-rescue_XT60-M-CaelusPCB
J28, J29
1
RJ45EthernetBreakout
Ayo1
1
Battery_Cell
BT1
2
LED
D1, D2
27
R_US
R1, R2, R3, R4, R5, R6, R7, R8 +19
2
R
R10, R17

Caelus design files

The KiCad project lives in the CaelusRocketry/launch-box repository on GitHub; these links point at the commit this page was built from.

Caelus: common questions

What microcontroller does the Caelus use?

The Caelus is built around the Teensy3.6, from the NXP family.

How big is the Caelus PCB?

The Caelus measures 247.7 × 178.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Caelus?

89 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Caelus design files?

From the CaelusRocketry/launch-box repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Caelus design in my own project?

The repository has no license, so all rights stay with CaelusRocketry. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Caelus without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.

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